Can the TH8320U1008 thermostat be used with a heat pump system?
Yes, the TH8320U1008 thermostat is compatible with heat pump systems. It supports a wide range of system types including warm air, hot water, high-efficiency furnaces, and heat pumps. (Page 1)
From the official Honeywell Th8320U1008 Thermostat manual, page 1
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